Mongoose v5+ with Retry.js

const mongoose = require('mongoose');
const {
  MONGO_IP,
  MONGO_PORT,
  MONGO_USER,
  MONGO_PASSWORD,
} = require('./config/config');

const mongoURL = `mongodb://${MONGO_USER}:${MONGO_PASSWORD}@${MONGO_IP}:${MONGO_PORT}/?authSource=admin`;
// console.log(mongoURL);
let retryAttempts = 0;
const connectWithRetry = () => {
  retryAttempts++;
  mongoose
    .connect(mongoURL, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
      useFindAndModify: false,
      useCreateIndex: true,
    })
    .then(() =>
      console.log('connected to mongo', `on attempt ${retryAttempts}`)
    )
    .catch((err) => {
      console.log(`error on mongoose connection ${err}\nRetrying ...`);
      if (retryAttempts < 4) {
        setTimeout(connectWithRetry, 5000);
      } else {
        console.log(
          `bailing out on connection attempts after ${retryAttempts}, escalate to devOps`
        );
      }
    });
};

connectWithRetry();